Laddie Boy was an Airedale Terrier owned by U.S. President Warren G. Harding. He was born in Toledo, Ohio. His father was Champion Tintern Tip Top. He was presented to Harding by Charles Quetschke of Caswell Kennels and became a celebrity during the Harding administration.

The Airedale Terrier, also called Bingley Terrier and Waterside Terrier, is a dog breed of the terrier type that originated in the valley (dale) of the River Aire, in the West Riding of Yorkshire, England. It is traditionally called the "King of Terriers" because it is the largest of the terrier breeds. The Airedale was bred from the Old English Black and Tan Terrier and the Otterhound and probably some other Terrier breeds, and has contributed to other dog breeds, such as the Yorkshire Terrier.